Will a 92 crown vic motor fit in 95 mustang?

No, a 1992 Crown Victoria engine will not fit in a 1995 Mustang without significant, and likely impractical, modifications. The engine bays are completely different sizes and shapes, and the mounting points won't align. The transmissions are also incompatible. While you might be able to *force* some parts to fit, it would be a tremendously complex and expensive undertaking, likely costing far more than simply buying a suitable engine for the Mustang.